Designing for output messages sent while in between-brackets state

When IMS is between-brackets, it sends the BID command to bid the workstation before actually sending an output message.

If the bid is rejected, the recoverable output message remains queued if the exception sense data indicates an RTR is forthcoming; otherwise, the message is discarded.

If IMS receives an exception response to an irrecoverable output message (inquiry-only transaction), the message is lost, because IMS dequeues the message immediately upon sending it to VTAM®.